Formula to calculate the average of a number of fields

I've developed a function that allows you to do it easily. The basic code is:

/*

    @17537118

        aFields : an array of the field names to use for the calcluation

        bIgnoreBlanks : a boolean that tells the function whether or not to ignore blank fields

        bIgnoreZeros : a boolean that tells the function whether or not to ignore zero values

*/

function calcAverage(aFields, bIgnoreBlanks, bIgnoreZeros) {

    var total = 0;

    var n = 0;

    for (var i in aFields) {

        var f = this.getField(aFields[i]);

        if (f==null) {

            console.println("Error! Can't locate a field called: " + aFields[i]);

            continue;

        }

        if (f.valueAsString=="" && bIgnoreBlanks) continue;

        var v = Number(f.valueAsString);

        if (isNaN(v)) continue;

        if (v==0 && bIgnoreZeros) continue;

        total+=v;

        n++;

    }

    if (n==0) event.value = "";

    else event.value = total/n;

}

You can then call it from the field's calculation script like this:

calcAverage(["Field1", "Field2", "Field3"], true, false);

Edit: Fixed some small spelling mistakes in the code